Definition of tree onion
: any of several perennial garden onions that constitute a variety (Allium cepa variety viviparum) of the common onion, are grown chiefly as a curiosity or for early salad onions, and are propagated by bulbils that replace the flowers in the inflorescence —called also Egyptian onion, top onion — compare multiplier onion
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up tree onion? Please tell us where you read or heard it (including the quote, if possible).